Adjustable internal gauge



April 21, 1925.

A 1,534,152 n J. BATH ET- AL Filed Oct. 27, 1919 niree sr est r e i e liti-ll Jenn BATH Nn Rosnar H. c. eannnwann, on wonen-erna, massacrrusnrrs, Assia-Nens 'ro .Tenn Barn a co. inc., A cenronerion or MASSACHUSETTS.

ADJUSTABLE INTERNAL GAUGE.

Application filed October 27, 1919. Serial No. 333,651.

To all whom it may concern:

Be it` known that we, JOHN BATH and Romana. H. C. GnUNnwALD, citizens of the United States, both residing at idlorcester, in the county ot lvorcester and State of l/iassachusettsJiave invented a new and luseful Adjustable Internal Gauge, ot which the following is a specification. f

This invention relates to improvements in an internal adjustable gauge ci the type shown in the prior application of John Bath and 1Walter E. Gray, Serial No. 300,053,

tiled May 27, 1919. i

One object of our present invention is to provide improved means for locking the gauge in a predetermined or Zero position. Another object is to provide an improved device for clamping the gauge in any desired position. Further objects of our invention are to provide means for protecting the operating screw from dirt and injury and also tor protecting the centers and preserving their accuracy.

Our invention further relates to arrangements and combinations of parte hereinafter described and more particularly pointed out in the appended claims.

A preferred form of our invention is shown in the drawings, in which- Fig. 1 isa longitudinal sectional elevation of our improved gauge;

2 is an end view thereof;

Fig. 3 is a transverse sectional view taken along the line 3-3 in Fig. 1; i Y

Fig. l is adetail plan view ofl portions of certain parts, and

Fig. 5 is a detail plan view of certain parts. n v

Referring to the drawings, our improved gauge comprises a body 10 having an enlargedv end portion orliange 11. A threaded rod 12 has a bearing in the body 10 and is provided Vwith a shoulder 13 engaging an internal flange 14 ot the body 10, by which axial movement ot the rod 12 in one direction is prevented.

A adjustable member or head 15 is threaded on the rod 12, and is moved axially when the rod 12 is rotated. The head 15 Vis provided with a plurality of dove-tailed tapered guide-ways 16 (Fig. 3) within which tapered gauge bars 17 are slidably mounted. rEhe gauge bars are held from axial movement by engagement with the flange 11 at one end and with a collar 18 at the opposite end.

At least Vone ot the gauge bars 17a is preferably slotted radially at each end as indicated at 19 and 2O at. Fig. 1. A key 21 mounted in the flange 11 extends into the slot 19 and a similar key 22 mounted in the collar 18 extends into the slot 20. The gauge-bar 17a is thus held for radial movement only and itself limits the movement ot each of the other gauge-bars to radial movement only, as the bars are all held in spaced relation in the head 15.

ylhe collar 18 is mounted on a sleeve 23V which in turn is slidable on a reduced end portion 2a ot' the threaded rod 12, to which it is keyed. A nut 24@ is mounted on a threaded outer portion 25ct the rod 12 and acts against a washer 2G which in turn engages an inner shoulder on the sleeve 23. A check nut 27 locks the nut 211 in adjusted position and also extends beyond the end oi' the threaded portion 25 of the rod 12, thus preventing accidental injury of the center hole therein. Bymeans of the nuts 24 and 27, the collar 18 may be adjusted to take up all back-lash at the ends ot the gauge bars 17.

An additional collar or ring 28 is mounted on the outer end ot the sleeve 28 and may be secured in adjusted position thereon by a set-screw 29. As thecollar 2S rotates with the threaded rod 12 and the collar 18 is relatively stationary, we provide graduations 30 upon the collar 18 and a zero mark 31 on the collar 28 by which gauge readings may be obtained. The gauge may be set to any desired size, after which the Zero marl; 31 may be brought to correspond with the zero of the graduations 30 and the graduations will then indicate variations above or below the desired size.

It is to be noted that the inner portion 32 or" the sleeve 23 extends into a recess 33 in the outer end of the head 15, while an extension 3l onthe headl similarly extends into a recess 35 in the end of the body 10. These extended portions protect the thread of the rod 12 from injury in every position ol the head 15. f

A portion ot the thread in the head 15 is formed on a collar 36 w. ich in turn is threaded into the head 15 but with a thread of a di'lierent pitch. By slightly turning lil ' graduations le having` a ledge or rib el at one edge slid# the collar SG, which is provided with a suitable s rauf-driver slot7 any looseness between the head and the threaded rod 12 iiiay be talceii up. The colla may i be held in adjusted. position by a set-screw Si.

lt is desi able to proif'ide a stop by which the lrange iiiay be quickly set a selected standard size, and tor this purpose we provide a sleeve 3S lined in the body l0 by astud or srevv 39, and providing a bearing` for an extension -l-O oittlie thresdet rod l2.

The sleeve'SS is provided with a .slot ell (Fig. Ll) to receive a lug toriiied on the Aid oi. a second sleeve: 4:3 keyed at 40 to the extension -l-O oiith'e threaded` rod l2 and slidable thereon. @utivard inovenient of the sleeve -ll is liniited by a. not threaded on the extension Ll() and also serving to protect the center troni rlie outer portion ot the sleeve 43 may be lniurled to provide aV convenient part by which the threaded rod l2 niay be turned.

Villien the sleeve 4.3 is in the position shown in Fig'. l the rod l2 ii'iay be Jji'eely turned, but it it is desired to loclr the gauge in a lined position the sleeve is pushed inward until the lug'V enters the slot ln assembling; the gauge, tlie gauge-'bars 17 are iirst iinished by grindingandl polishing and are then set to a standard ring gauge beterev the hole 'toi' the stud 39 is drilledl in the collar The sleeve is then pushed inward to engage the slot'in the collar 38. The hole is then drilled and the stud Si) is inserted. lt follows-that ulienev -r the' parts are' returned to this: position the gauge will indicate the originalstandard sine.

ln order to read directly the exact size:`

to which. the! gauge'is set, it is necessary to einploly" a set et graduations additional yto those shown on the: collar i8, as the latter graduations coniinonly represent inerely sub-divisions ot one oiie-huiidredth ot an inch.

Accordingly ive provide an index or! Zero niark l5 on one ot' thegauge bars as 17' (Fig. l) and l provide cooperating` gra-duations 5) on Vthe head l5, one ot these graduations being niarlred with the iioiiiinlal size off the gauge. Preferably the are formed. on a plate t7 able in' a` slot in the head l5. The plate 4l? is secured in adjusted. position by screws e8` extending through eloiigatcd openings e9 in the plate and bindingr the plate to the head l5. llllien the bars 17 bec-orne Worn and are re-grouiid the relative position of the head l5 for a given standard size'is changed, but the provision of the adjustable plate ierinits the scaley to be adjusted to again' indicate thecorrect size attei each refrinding.

We have also provided.'iiiiproved nieans to clamp the threaded rodV l2 in anyV desired position to preserve any setting ot the gauge. For this purpose ive provide two radial openings 50 in the body l0 Within which are slidablyV mounted plugs 5l having inclined outer end surfaces. rEhe plums' ol are cngaged by the clamping nut threaded. to the end ot the body l() and having; an iiiternal conical surface 53 adapted to torce the plugs" 5l radially inward against the surface ot' the sleeve d3 which inturn is keyed to the extension 40 ot the rod lilavingi thus described our invention, it

'will Vbe evident that We have provided an` adjustalileV internal gauge embodying -desirable and novel features ort construction, and it will also beV evident that changes and ii'iodillcations can be inade in our invention within the spirit andn scope thereof as set forth iii the claims. Therefore we do not WishV to be otherwise liniited to the detailsl herein disclosed but vliat We claiiii is l. .ein adjustable internal gauge comprisingl a body, a threaded rod rotatable therein but held 'roin axial nioveinent relative thereto, a plurality ot gauge bars having faces inclined tothe longitudinal axis ot said rod, an 'adjusting ineniber threaded on saidy rod and slidably svpportingsaid bars, said ineinber having inclined faces cooperating withy Ythe inclined faces ot said gauge bars to adjust the-in radially when said iiieniber is inoved axiallyot said rod and longitudinally ot said gauge bars, a sleeve lined in said body, and a second sleeve mounted on` said rod and 4axially inovable thereonv but held :troni angular inoveinent relatively thereto..

said sleeves havingcooperating portions which,r Xviien brought into engagement by axial nioveincnt ot one ot said sleeves. prevent angular movement ot. said rod relative to said body.

2. An adjustableV internal gauge comprising a body, a threaded rod rotatable therein but held troni axial inovein'ent relative thereto, a plurality oft gaugegbarshaving laces inclined to the longitudinal airis ot' said rod, an adjusting ineniber threaded on said` rod and slidably supporting said bars, said inember having inclined faces cooperating with tlieinclined faces et said gauge bars to ad.-

just thein radially When .sa-.id ineiiibei:` is

conical surface effective to engage said members and force them inward to clamping position.

il. in adjustable internal gauge comprising a body, a. threaded rod rotatable therein but held from axial movement relative thereto, a plurality of gauge bars having faces inclined to the longitudinal axis of said rod, an adjusting member threaded on said rod and slidingly supporting said bars, said member having inclined faces cooperating Withthe inclined faces of said gauge bars to adjust them radially when said member is moved axially of saidrod and longitudinally of said gauge bars, and a sleeve having a bearing in said body and mounted ou said rod for axial movement only relative to said rod, said body having radial openings therein, and having clamping plugs slidable in said openings and engaging said sleeve, and means being also provided to force said plugs inward against said sleeve to clamp said rod in adjusted angular position in said body.

5. An adjustable internal gauge comprising a body, a threaded rod rotatable therein but held from axial movement relative thereto, a. plurality of gauge bars having faces inclined to the longitudinal axis of said rod, and an adjusting member threaded Von said rod and slidably supporting said bars, said member having inclined faces coopera-ting with the inclined faces of said gauge bars to adjust them radially when said member is moved axially of said rod and longitudinally of said gauge bars, said member having an extension and said body having a recess Within which said extension is received, said extension covering and protecting the threaded rod as said member is moved away from said body.

6. An adjustable internal gauge compris ing a body, a threaded rod rotatable therein but held from axial movement relative thereto, a plurality of gauge bars having faces inclined to the longitudinal axis of said rod and an adjusting member threaded on said rod and slidably supporting said bars, said member having inclined faces Coopera-ting with the inclined faces of said gauge bars to adjust them radially When said member is moved axially o-f said rod and longitudinallyv of said gauge bars, a bar retaii'iing sleeve mounted on the gauge end of said rod for axial movement only relative thereto, and means to adjust and secure said sleeve in desired axial position on said rod.

7. An adjustable internal gauge comp-rising a body, a threaded rod rotatable therein but held from axial movement relative thereto, a plurality of gauge bars having faces inclined to the longitudinal axis of said rod, an adjusting` member threaded on one end of said rod and slidably supporting said bars, said member having inclined faces cooperating with the inclined faces of said gauge bars to adjust them radially when said member is moved axially of said rod and longitudinally of said gauge bars, a retaining slecve mounted on the end of said rod adjacent said gauge bars for axial movement only relative thereto, means to adjust said` sleeve axially and to secure said -slee-ve in adjusted axial position on said rod, and means to indicate the adjusted angular position of the sleeve.

8. An adjustable internal gauge comprising a body, a threaded rod rotatable therein but held from axial movement relative thereto, a plurality of gauge bars having faces inclined to the longitudinal axis of said rod, an adjusting member threaded on one end of said rod and slidably supporting said bars, said member having inclined faces cooperating with the inclined faces of said gauge bars to adjust them radially when said member is moved axially of said rod and longitudinally o-f said gauge bars, a retaining sleeve mounted on the end of said rod adjacent said gauge bars for axial movement only relative thereto, arecessed adjusting mit for said sleeve, and a lock nut in the recess of said adjusting nut.

9. in adjustable internal gauge comprising a body, a threaded rod rotatable therein but held from axial movement relative thereto, a plurality of gauge bars having faces inclined to the longitudinal axis of said rod, an adjusting member threaded on one end cf said rod, and slidably supporting said bars, said member having inclined faces cooperating With the. inclined faces of said gauge bars to adjust them radially when said member is moved axially of said rod and longitudinally of said gauge bars, abar retaining sleeve mounted on the end of said rod adjacent said @auge bars for axial movement only relative thereto, a recessed adjusting nut for said sleeve, and a lock nut in the recess of said adjusting nut, said locl nut extending beyond the end of said rod and protecting tho center therein from injury.

10. An adjustable internal gauge comu prising a body, a threaded rod rotatable therein but held from axial movement relative thereto, a plurality of gauge bars having faces .inclined to the longitudinal axis of said rod, an adjust-ing member threaded on said rod and slidably supporting said bars, said member having inclined faces cooperating with the inclined faces of said gauge bars to adjust them radially when said member is moved axially of said rod and longitudinally of said gauge bars, said member and one of said bars having parts carrying cooperating graduations, and means permitting relative adjustmentof the parts carrying said graduations.

ll. An adjustable. internal gauge compristudinally of said gauge hars, one of said ing a hedy, threaded rod otatable theregauge hars having an index thereon, a in but held 'from .axial nidvenient relative lgraduated plaie mounted on said head and the-reto, a plurality o1 gangjeibais having cooperating Witi said index to designate 15 faces inclined t0 the longitudinal axis of gauge diameter, and means permitting rela-4 said rod7 an adjustingmeinhei theaded on tive axial adjustment o'isaid plaie on Said said rod and Slidaliiy supporting said hars, head.

saidr member having' inclined faces coop- In testimony whereof We have heieunlio eratnig Wizh Jshe inclinedV faces of said gaugea nfied our signatures. bars to adgust them radially when said inein- J @HN BATH.

ber is moved axially of said rod and longi- RBERT H. C. GRUNEWJJD. 

